The reduction of iron(III) oxide (Fe203) to pure iron during the first step of steelmaking,

Chemistry

1 answer:

Anna71 [15]3 years ago

5 0

Answer:

The minimum mass of coke needed to produce 850 t is equal to 172223.4 kg

Explanation:

The balanced reaction for the formation of the is as follows:

2Fe + 3/2O2 = Fe2O3, ΔG = -830 kJ/mol

Fe2O3 = 2Fe + 3/2O2, ΔG = +830 kJ/mol

2Fe2O3 = 4Fe + 3O2, ΔG = (+830*2) = +1660 kJ/mol

the mass of iron = 850 ton = 850000 kg

the necessary energy will be equal to:

Energy = (1660*850000)/(4*56x10^-3) = 6.299x10^9 kJ

the energy released by 1 mole of CO2 is equal to 439 kJ/mol

mol of CO2 = 6.299x10^9/439 = 1.434x10^7 mol

now we will calculate the kilograms of coke that are required:

mass of coke = 1.434x10^7 mol * (12.01 g/mol) * (1 kg/1000 g) = 172223.4 kg

You might be interested in

What is a zero order reaction? Give two examples.

dezoksy [38]

Answer:

I guess 3 to be honest and that's what I think

4 0

3 years ago

Why is fossil fuel considered a nonrenewable energy source?

IRINA_888 [86]

Answer:

$\boxed {\tt Takes \ many \ years \ to \ replenish}$

Explanation:

A nonrenewable is a resource that cannot quickly be regenerated. A nonrenewable resource will eventually run out, and it cannot be remade for many years.

For example, <u>fossil fuel </u>is formed from fossils after millions of years of heat and pressure turn them into fuel. Since they take many years to create, they are a <em>nonrenewable energy source.</em>

3 0

3 years ago

Las capas del lecho marino del Mar Mediterráneo cuentan la historia de los cambios ambientales en el hoy desértico norte de Afri

slamgirl [31]

Answer:

160.000 años corresponde a 16.000 décadas.

Explanation:

Para resolver correctamente el ejercicio debemos plantear la regla de tres simple de la siguiente manera:

1 década equivale a 10 años; A cuantas decadas equivalen 160.000 años?

1 década→10 años

x ←160.000 años

Debemos multiplicar 160.000 por 1 y luego dividir entre 10 ;